Frequently Asked Questions

Part-66 defines the aircraft maintenance licence framework used in the EASA system, including licence categories, knowledge and experience requirements.

In broad terms, B1 focuses on mechanical, powerplant and related electrical systems, while B2 focuses on avionics and electrical systems. Exact privileges depend on the applicable regulation and licence.

It is the common name for an FAA mechanic certificate carrying Airframe and Powerplant ratings.

No. FAA and EASA are separate regulatory systems. Working or certifying privileges depend on the authority, employer and applicable approvals.

An AML is a regulatory licence that grants defined aircraft-maintenance certification privileges within its applicable framework.

A type rating records qualification on a specific aircraft type or type group where required by the licensing framework.

OJT means On-the-Job Training: structured practical training and experience performed in the real maintenance environment under applicable requirements.

No. A regulatory licence and an employer or maintenance-organization authorization are separate concepts.

Line maintenance generally covers maintenance performed in an operational environment within the organization’s approved scope, often with shorter maintenance windows.

Base maintenance generally involves larger planned work packages, deeper access and longer ground time in a hangar environment.

Aircraft on Ground describes an operational situation in which an aircraft cannot return to service until the required action is completed.

AMM means Aircraft Maintenance Manual and contains manufacturer maintenance instructions for the aircraft.

IPC means Illustrated Parts Catalog, used to identify parts, assemblies, part numbers and installation relationships.

CMM means Component Maintenance Manual and provides maintenance instructions for a specific component.

The MMEL is the master reference developed for an aircraft type; an operator MEL is developed and approved or accepted for that operator within the applicable regulatory framework.

SRM means Structural Repair Manual and contains structural damage limits, allowable-damage criteria and approved repair information for applicable structure.

WDM means Wiring Diagram Manual and provides aircraft electrical wiring and interconnection information.

Fault Isolation Manual and Troubleshooting Manual are fault-isolation references used on applicable aircraft programs.

An Airworthiness Directive is a mandatory airworthiness action issued by an aviation authority when required for continued airworthiness.

A Service Bulletin is a manufacturer technical publication describing recommended or defined inspections, modifications or other technical actions.

Many organizations employ non-certifying maintenance personnel, but permitted tasks and supervision depend on local rules, organization approvals and company procedures.

Yes. Maintenance manuals, defect records, procedures and international aviation communication rely heavily on precise technical English.

It should clearly present aircraft types, maintenance environment, ATA experience, training, licences or authorizations, technical skills and relevant employment history.

MRO stands for Maintenance, Repair and Overhaul and refers to organizations and activities providing aircraft, engine and component maintenance services.

Maintenance Control Center coordinates operational technical issues, defects and maintenance support within an operator’s procedures.

Certificate of Release to Service is the maintenance release or certification confirming required work has been completed in accordance with applicable requirements.

It suggests likely ATA chapters from a system, component or maintenance term for educational navigation.

No. The site is for education and general reference only. Actual maintenance must use current approved data and company procedures.

No. They are quick educational/reference calculators. Maintenance-critical values must be verified with approved data and calibrated tooling where required.

No. Fleet and company figures are dated snapshots and may change. Check the freshness note and official sources.

No. It is an independent educational and career-information platform.

Many maintenance terms and document names are used internationally in English. The site keeps standard expansions while translating explanations where useful.

Yes. Use the language selector to view supported interface and explanatory content in Turkish, English or German.

Use the Contact page and email the published address with the page name and the correction you suggest.

Yes. Topic suggestions and content feedback can be sent through the Contact page.